Shoe-sole skiving machine



March 7, 1933. R, H BARKER 1,900,786

SHOE SCLE KIVING MACHINE Filed 0G13. l5, 1931 3 Sheets-Sheet l A. INVENTOR WITNESSES Ralph Barker ATTORNEYS R. H. BARKER March 7, 1933.

SHOE SOLE SKIVINC.- MACHINE 3 Sheets-Sheet 2 I Filed oct. 15, 1931 INVENTOR RaZph/HBCLMSQP BY ATTORNEYS WITNESSES March 7, 1933. R. H. BARKER sHoE soLE sKIvINc- MACHINE Filed Oct. 15, 1931 5 Sheets-Sheet 3 29 ZW/' 7o 69 Y0 37' 71 lNvENToR f Ralph/JL Barker WITNESSES IWV BY m gig/55 0 ATTORNEYS Patented Mar. y7, 1931i RALPH H. BAKKER, or DERBY, NEW HAiseirsHIRnY .y

`suon-'Sonn SKIVING MACHINE Application' led October 15, V1931. Serial No. 569,044.

This relation relates to shoe machinery and particularly to an improvedimachine for skiving or cutting the heel portion of a sole, the object being to' present a machine which will operate to accurately cut the heel of a sole quickly and in such a way as to form a heel-seat with long beveled edges which accurately fit the heel,and to leave a large tab tov fit the space between the heel and bottom of the shoe and for the reception of nails or other securing means. y f

Another object of the invention is to provide a. machine for skiving lthe heel portion of a sole in a way to present aU-shaped chainfered end with the breasting line chainfered by the same knife as used in cut;

ting the ends and sides.

A further object is to provide a machine wherein the heel of the sole may be skived to present a universal breasting line which will eliminate perpendicular cuts with -the chamfering on the flesh side of the leather so designed that the chamfering may bev done before the sole is attached to the shoe.

An additional object is to provide in a skivingmachine means including rollers for depressing part of ing operation.

* Figure 2 is a longitudinal sectional view through Figure l approximately on linev Figure is a top plan view on `an ,en-

larged scaleof the die,roller and associated parts. y e l f Figure 4 is a sectional view through Figure 3 on line H. v

Figure 5 is an enlarged sectional view through the die and associated-'parts withI a sole in position.

the sole during the skiv-V An additional object, more specifically,

Figure 6 is a sectional view through Figvure 5 approximatelyon line -(if p Figure 6a is a view/similar to Figure 6, but showing a modified form wherein the presser-foot is eliminated. 4

Figure 7 is a perspective view. of the rear end of the sole immediately before the skived portion .has been remove Figure 8 is a transverse sectional view through theskived heel portionand sole, the same being shown in position on a shoe indicated dotted lines, and with a wooden heel arranged thereabove ready to be pressed against the shoe. j

Figure 9 is a fragmentary View showing 65 the heel end of a sole after the same has been skived and illustrating the beveled breasting line formation. i i

Figure 10 is an enlarged perspective view of the die, roller and associated parts shown in plan view in Figure 3.

, Figure 11 is a top plan view of the knife with attached roller acting through a vertical slot to depressthe leather. r

Figure 12 is a sectionalV view through Figure 11 on line 12%12.

In the manufacture of shoes, it has been found necessary to chainfer or bevel the heel po-rtion ofthe sole in order to receive the heel, particularly where the heel Vis formed ofwood. It is still the practice to bevel or chamferfthe heel portions by hand though a number of machines have been devised tofsecure this result, as for instance thepat'ent to Lewis- No. 1,787,384. In the 85 present skiving machine, the structure presents the general outlay of the Lewis patent, but provides a. number of improvements thereover whereby a better skiving action is secured, and one wherein the structure needs theuse of only one knife to produce the chamferedl edge and the breasting line cut; Y Y

At present, whether done by hand ormachine, the back part and sides of the heel 9 seat are cut with a slight bevel and the front part of said heel-seat is ybreasted with a sharp cut perpendicular to said beveled cut. At the junctionof these Vtwo lcuts is an offset at approximately right angles tothe edge of the sole of the shoe. The front surface of the heel must exactly fit said offset and said perpendicular cut or al space will show between the heel and sole when completed.

The heel is always fastened to the sole on the grain side of the leather which heretofore has been chamfered to receive said heel. Because of a variation in the size of the heels supposed to be exactly alike and because the .sole-layer may and does slightly vary the position of the sole when fastened to the sole of the shoe, it is obviously practically impossible to always accurately locate the breasting point before the sole is attached to the slice. Even with the breasting done after the sole is attached to the shoe, it is found necessary to keep together the identical heel and the shoe prepared for it until the heel is listened to the shoe, because of said variation n the size of heels.

Une object of the present invention is to eliminate the very definitely positioned narrow breasting line by providing bevels with long surfaces, the middle transverse portions of which are located where the draftsman determines the breasting line should be. These bevels furnish large surfaces which provide practically a universal breasting line and thereby make it practicable to prepare the heel-seat before the sole is attached to the shoe.

The invention further contemplates chamfering the leather on the flesh side thereby removing poor leather and leaving a broad heel tab with tough grain leather extending to the margins of said tab for the heel to rest upon and to receive nails or other means for fastening the heel to the shoe. Heretofore more grain than vflesh side of leather has been removed by chamfering.

It will also be seen that when the sole is chamfered on the flesh side of the leather, the chamfered surface which is in Contact with the shoe when the shoe is completed, can be made to tit tie irregular space in the bottom of the shoe so that both the upper and lower surfaces of the tab will fit. the surfaces with which they will be in contact.

In the drawings, the embodiment of the invention illustrated includes what may be ter-med a frame or base 1 adapted to be placed on a suitable support 2. Yoke 3 is bolted or otherwise secured to base 1 and straddles the plate el which may be secured to the frame 1 in any desired manner so as to project the desired distance therebeyond as illustrated in Figures 1 and 2. A pair of supporting brackets 5 are belted or otherwise rigidly secured to the frame 1, the same carrying a. pin 6 on which is pivotally mounted the lever 7, said lever being connected by pin 8 to the extension 9 of the slide 10 slidably'mounted in the bracket 3. A screw 11 is carried by the slide 10 as shown in Figure 2. said screw having an enlarged end 12 whereby a spring 13 is confined between the enlarged ends 12 and the bracket 3 so as to normally hold the slide and parts connected therewith in the upper position as shown in Figure 2. The lower end of t ie slide 10 carries a presser-foot 141 which may be integral therewith or may be inade separate and rigidly secured thereto by scre vs or other desired means. The frame 1 also carries guideways 15, said guideways being bolted or otherwise rigidly secured to the hase or frame, said guideways accommodating the slide plate 16, which plate is pivotally connected by pin 17 to the block 18, which block has a threaded bore 19 adapted to receive one end of the threaded rod 20. Rod 20 is provided with right and left hand threads at the respective ends, one end being screwed into the threaded socket 19 and the other into the enlargement 21 of the strap 22, whereby a proper adjustment may be secured between these two members. Strap 22 lits over the eccentric 23 which is rigidly secured to shaft 2st, which shaft also has a cam 25 rigidly secured thereto, said cani having an outer surface 26 and an inner surface 2T, said surfaces being spaced different distances from the center of shaft- 21 so that when the wheel 28 is on one surface, the lever 7 and associated parts are held in a raised position and when engaging the other surface is held in a lowered position, the inclined cam faces 30 and 31 act to quickly move the parts back and forth. ln this way the presser-foot 141 is quickly raised and held raised and then is quickly lowered and held lowered for a certain time. While this is taking place, eccentric 23 is rotating and is moving slide plate 1G and associated parts. ln this way the roller 29 and associated parts are moved in timed relation to the movement of the presser-foot 14.

Knife 32, Figures 11 and 12, is provided with avertical longitudinal slot 93, into which roller 99 extends, said roller being rotatably supported by spring 100. his spring has slots 101 adapted to receive screws 102 which clamp the spring to the knife. By moving said spring longitudinally, the distance between the cutting edge of knife 32 and roller 99 can be adjusted as the knife wears by use and grinding. toller 99 acts through a slot in the knife upon leather under the knife behind its cutting edge to keep the leather depressed and firmly seated in the corrugations into which roller 29 has forced the leather, thereby preventing` the leather from slipping by the pull of the knife when it chamfers the bevels 47 and 48. From Figure 2, it will be seen that said skiving knife is rigidly secured to the slide plate 16 and is embedded therein so that the lower surface thereof will be iiush with the lower surface of the slide plate 1G with a vertical slot in the front edge to receive rolladjusted longitudinally in respect to slide i plate 16. A screw 40 is carried by the end of frame 37 opposite roller 29 and acts as a fulcrum when frame 37 carrying-roll r 29 is elevatedor depressed. The rod carries a washer 41 rounded onthe lower surface, a

spring 42 and an enlargement 43, which may v be `a nut if desired. The spring 42 'acting against the enlargement 43 presses against the washer 41 and the washer in turn presses against the clamping plate whereby frame 37 is urged to move downwardly.

' `When the parts are in the position shown in Figure 2, the sole 44 is in placeand ready to be slrived or trimmed. As the parts continue to move the roller 29 will move for-v ward and approximately at the tiineit contacts with the heel-end of the lsole 44, the presser-loot is lowered and caused :to press against tliesole, thus holding the parts in position as the roller 29 and knife 32 con tinue to move forwardly. Asv they move torwardly, the heel section of the sole is cut as shown in Figure 7. The movement,

', however, is continued until the portion 45l is completely severed, thus leaving a chamlered edge 46 on both sides and one end as well as chamfered portions 47 and 48.l Any part of the chaml'ered portions 47' and 48 may act as a breasting line and will coact with a heel of the proper size. It will be understood that this is very desirable in that wooden heels slightly vary in size even though they are presumed to be of the same size. Heretotore this slight variance made it necessary for the workman to lit a certain heel to a certain sole. The 'sole and heel were properly positioned to fit but it a ditferent heel, though presumably of the same size, were used, it would many times .not lit. By having the breasting line beveled instead oi cut oil straight, i. e., out oil at right angles to the heell seat and perpendicular to the same, any stock heel of a proper size,

, even though slightly varying in size willlit accurately,.and may be fastened to the shoe in the usual way without any further breasting or shaping oi the heel-seat.` As illustrated in Figure 10, the die ,34, is provided with a U-shaped depressionhaving corrugations 49 at the bottom and corrugatioiis 50 at the sides, said side corrugations eX- tending around the rounded end 51. On each side of the corrugations 50 there is provided flat surfaces 52 and 53, which merge intoinclined Vplanes 54 and 55, said inclined planes merging into fiat surfaces 56 and 57. The surfaces 56 and 57- merge into inclined or chamfered portions 58 and 59, which in turn merge into inclined planes .L

60 and 61. The corrugated bottom 49 merges into an inclined plane 62 which eX- tends dowiiwardlyto the supporting block 63 which block is mounted on the support 4 and connected thereto in any desired man- V' ner, as for instance by screws. The die 34 may be made of one piece, or a plurality of pieces as preferred and may be connected with bloclrA 63 by screws or .other suitable means so that there will be no relative movement between the block and the die.

On each side of the die there is .provided a plate 64 which is connected by screws 0r other means to the block 63 which carries cam blocks 65 and 66, each cam block being connected by screws or other means to the respective plates 64 and also provided withV an inclined cam tace 67 over Vwhich the rounded ends 68 of frame37 move when the deviceis inuse. The roller 29, as shown in Figure 10, is provided with an enlarged cylindrical section 69 and Ybeveled or in.- clined sections 7() and reduced vcylindrical portions 711.V A shaft 72 extends through the entire roller 29 and the end 68 whereby pressure on the traine 37 will be transmitted to the roller. VJ hen a sole is placed on the die, it is positioned so that the heel end will slightly overlap the-corrugated end 51 as shown in Figure 1G.' As the'roller 29 moves over the heel end of the sole, the centrial section depresses the leather as shown in Figure 5, while the beveled portions or sections 70 conform to the incline of the corrugated sides 50. i

By reason of the resilient action of the frame 37, caused by the spring 42, the central section 69 of the roller 29 moves down the inclined cam 62 when the samey reaches this point and as thesurtaces 56 and 57 are lower than surfaces A52 and 53, the lrnit'e will cut the portions 47 and 43 as shown in Figure 7 as the leather sole lies in contact with bevels 54 and 55, so that the finished product will appear as shown in Figure 9. Line 103 on bevels 54 and 55 is located where the line which the drattsman, when he prepares the patterns. for the shoe, determines the breasting line shall be. Any portion of bevels in front of and behind line 103 can serve equally well as breasting points. The bevels 54 and 55 thereby Vconstitute a universal breast-ing line. It will readily be seen that the side portions of the sole will move 'downwardly and resteny the surfaces 56 and 57 and consequently will be below the knife as indicated at the right in Figures 6 and 6a. By varying the beveled surfaces 66, 6l, and 62, and the beveled surfaces 54 and 55, the shape and `width ot the portions 47 and 48 lio justing the guide along the bead 8G.

may be varied so that there Will be a Wide breastiug portion or a narrow breasting portion preferred.

In ltigure Ga a diilerent arrangement is used to that shown in Figures 2 and G. ln this forni of the invention, the presser 14 is eliminated and the roller Q9 acts to keep the parts depressed until the knife 82 has performed its function.

As illustrated in Figure 3, there are provided centering spring members 72 and 73 for centering the heel portion of the sole so that it will rest properly in the die 311-. The tore part oi" the sole will extend to one side or the other of the median line dravn through the center of the die 3e according to Whether it is the right toot or lett foot. As shown in. Figure 3, there are provided adjustable guides 7 5 and 7 G to guide the Werlman in placing the sole in position. lVhere it is a right toot sole as shown in Figure 3, the guide 7 6 is adjusted to the proper position and then clamped in place by operattlie clamping screw 77. li a sole tor the o1 positc shoe were being skived, the guide 75 would be utilized. A resilient member or llat spring 78 is provided and positioned so that the toe et the sole Will engage the same when the sole is properly placed in the machine for skiving. rlhis spring is connected at 79 to an adjustable toe stop 80. Adjusting screws 81 and 83 are adapted to change the curvature of the spring 78 so that the spring will contact With the toe end of the sole. The stop 8O is provided with enlargements 8l slid-ably litted on the guides 85, which guides in turn are slidably mounted on their respective guiding beads 8G. rlhe guides 85 are each provided with a plurality of notches 87 separated from each other by the difference between tivo consecutive sizes of shoes and marked With numbers to indicate consecutive sizes, and a screw 88 for ad- A. semicircnlar disk 89 acting as a catch is held in place by lcl-shaped member 90 so that the spring 91 may hold the disk 89 in one ot the notches 87 and in the cut-a vay portion 92 ot the enlargement 84. In this Way, the

stop is adjustably locked in a desired position.

To place the sole in proper position on the die, locate and mark draiitsmans breasting `line on one sole ot' any size, A, then place said sole on die 3e so that said line shall coincide vi 'n the transverse line 103 connecting the middle parts of bevels ll and 55, Figures 3 and 10, then place side angle .guides 75 and 7G, Figure 3, in proper posi- `stop 8O is in contact with toe end et sole A.

Then the sole is in proper position to be chamfered. For any other size ot sole, place toe stop 8O in the required position and place the toe of said other sole in contact with spring 78. Only one adjustment of side angle guides 75 and 76 is required for all Sizes.

This machine, slightly modified, will chani'tcr the heel-seat on either side of the leather. Then the grain side et' the leather is chamfered the flesh side is in Contact with die Bil and all marks ol' corrugations are made on the liesh side of the leather and do not shovv on the sole of the shoe when linished. Consequently, corrugations might eX- tend the Whole length of the die including surfaces GO, 61, G2, also 58 and 59. lith corrugations on all these surfaces leather could be held securely Without any possibility of slipping` when the knife chamters the leather even Without using presscriioot lfor roller 99, Figure 6a. lVhen the flesh side of leather is chamtered, the grain side is in contact with die 34- and presents a much more ditlicult problem. Great care must be taken that no marks of corrugations are made on the sole of the shoe in trent of the heel, because said marks Will show on the sole when the shoe is completed. Hence, to avoid these marks, ll corrugations must stop a short distance behind the breasting point as shown in Fig. l0. TWithout corrugations in trent ot the breasting point or on surfaces 60, Gl, (52, 58 and 59, it is ditlicult to keep leather from slipping when it is chamtered at said breasting point.

ln skiving a sole described, the chamiterc-d part itl as shown in Figures 7 and 9 is on the flesh side o'i' the leather while the grain side 46 as shoivn in Figure 8 is untouched, thus presenting a smooth even surface for contacting with the curved portion 93 of the heel 94. Obviously, if chamfered on the grain side of leather, 46 Would be flesh side ot leather. When the sole is placed on the shoe 95, it is arranged as shown in full lines in Figure 8, but when the heel is fastened to the shoe, the leather takes position 9G, Figure 8, lilling the entire space between the heel and shoe. Providing a bevel at the breasting. line instead of a sharp ollset or cut used at present, allows for any reasonable variation the sole-layer may make When he tastens the sole to the shoe, also for any considerable difference in the size of the heel, and consequently any heel in stock may be used with any sole provided the same is of the correct size by number.

claim:

l. A skiving machine ot the character described including a shoe sole support having a flat upper surface, a die carried by said surface, said die being iorined with a longitudinally extending depression and roughly chamfered sides, said sides being connected at one end by the curved section of the die,

a roller for depressing the heel portion of a sole in said die so as to snugly fit the same, with the side portions of the sole projecting above said roughened portion, and a knife positioned to move in a direction substantially parallel to said sole for cutting away the projecting portions of the sole, said die having an inclined end whereby as the roller and cutter passes over said end, the entire sole will be depressed below the cutter and the edge of the cutter will move to a position over the sole as it finishes the cutting'stroke thereby producing a breasting line.

2. A sole skiver including a die formed with a central corrugated depression, and inclined side plates provided with like corrugations, said side plates presenting a U` shaped structure, an adjustable roller for t moving over the heel portion of a sole mounted in said die for depressing the central portion of the heel portion, a single horizontally moving cutter moving simultaneously and at the same speed as the roller, said cutter moving over the depressed part of the sole and cutting the parts at the end and on each side of the depressed part, said die having at one end inclined faces and depressed side members, said depressed side members being suliciently depressed to permit said knife to pass over the portion of the sole resting thereon whereby said knife will cut a breasting line as it passes over said inclined faces.

3. A shoe sole skiver including a substantially U-shaped die having a beveled portion on the inside of the legs of the die and a beveled portion in the ends of the die merging into depressed surfaces forming continuations of the die, a support for said die, said support having a fiat upper surface acting to support the die to prevent the shoe sole from protruding through the die when pressed by the roller and thereby causing the shoe sole to remain in a certain position for the cutting operation, means for holding the sole so that the heel portion will overlap said die, a depressing roller, means for forcing the depressing roller longitudinally over the die so that the heel portion of said sole will substantially lit said die with certain of the edges projecting beyond the die and the part of the sole beyond the legs of the die fitting on said depressed surface, and a cutting knife moving simultaneously and at the same speed as said depressing roller, said knife acting to cut offset edges and to form a bevel at the breasting line of the sole.

4. In a shoe sole skiver, a fixed die formed with a U-shaped depression adapted toreceive part of the heel of the shoe sole, a depressing roller, a knife having a cutting edge, said knife being formed with a longitudinally extending centrally positioned slot, a reciproca-ting member carrying said roller and said knife and acting to move thevknife and roller-simultaneously, the cutting edge of said knife being spaced back of said roller whereby the roller will depress said heel portion before the knife begins to function, said die having a depressed portion at the end of said U-shaped depression, a spring mounted on said lknife and a roller'carried by said spring'` projecting through said slot and acting on said heel portion under the knife and behind its cutting edge, whereby the heel portion is held firmly in the die while the cutter moves beyond the U-shaped depression in the die for severing the cut part from the heel portion.

5. A shoe sole skiver including a die provided with a U-shaped depression and a depressed portion eXtending beyond the depression, means for holding a shoe sole so that part of the same will rest on `the U- shaped depression and part over the depressed portion, a roller for depressing the heel portion of the sole intosaid depressed portion, a knife for trimming the edges of said heel portion and means carried by the knife for holding the heel portion of the sole depressed while the knife completes its cutting operation. f

6. A skiving machine of the character described including a shoe sole support having a flat upper surface, a die carried by said support, said die being formed with a longitudinally extending Slot and roughenedchamfered sides merging into said slot, a pair of centering springs for centering the shoe sole so that the heel portion will be positioned properly on said die and an adjustable guide for guiding the sole as it is placed in position so that it will be arranged at the proper angle, and means including depressing rollers and a cutter for severing a U- shaped section from the heel portion of the sole.

7 A skiving machine of the character described 'including a support for a shoe sole, a die mounted on said support, an adjustable toe-stop for a shoe sole arranged on said support, a pair of guides mounted on said support for guiding soles when being placed in position, a pair of centering springs for centering the heel portion of the sole whereby it will be properly centered over said die, and a plurality of means including depressing rollers and a knife for causing the removal ofa U-shaped piece from the heel end of said sole.

8. A skiving machine of the character described including a support, a die mounted on said support, means for holding a shoe sole so that the heel portion will rest on said die, said die having a depressed portion at one end, a presser for depressing that part of the sole forward of the heel portion to a point below the remaining part, a reciprocating roller for depressing thev central part of the heel poi-tion of said soie into said die so that the edges will protiude beyond the die, and. :L reciprocating knife eoacting with said roller for cutting said edges, said ykni'i'e moving to :L point over said .presser :for providing` n bieastng line at the ends of 'the cut edges, und nien-11s for moving in timed relation said presser foot, knife and roller.

RALPH H. BARKER. 

